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Re: Cumulative total [message #12838 is a reply to message #12828]

Fri, 18 September 1998 00:00

Andy Loughe
Messages: 174
Registered: November 1995

Senior Member

Nice, elegant solution, Eddie.

P.S. Weren't you the kid on... Nah!

eddie haskell wrote:
>
>> Can anyone suggest a more efficient way to compute the
>> running cumulative total of a 1-D array than using FOR loops?
>
> here is the way i do it:
>
> IDL> A = findgen(10)
> IDL> N = n_elements(A)
> IDL> result = A # (lindgen(N,N) ge transpose(lindgen(N,N)))
> IDL> print,result
> 0.00000
> 1.00000
> 3.00000
> 6.00000
> 10.0000
> 15.0000
> 21.0000
> 28.0000
> 36.0000
> 45.0000
>
> cheers,
> eddie

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[Message index]

		Re: Cumulative total By: bowman on Fri, 18 September 1998 00:00
		Re: Cumulative total By: Andy Loughe on Fri, 18 September 1998 00:00
		Re: Cumulative total By: eddie haskell on Fri, 18 September 1998 00:00

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